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Home >> Lexus >> 2020 >> RC F Base >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostics - Introduction >> Pre-Collision System >> Diagnosis System [09/2014 - 11/2017] >> Diagnosis System [09/2014 - 11/2017]

Diagnosis System [09/2014 - 11/2017]

  1. CHECK DLC3 
    1. Check the DLC3.

      Refer to GENERAL INFORMATION [09/2014 - ]

  2. FUNCTION OF WARNING INDICATOR AND MESSAGE 
    1. If the pre-collision system is not functioning properly, the driver is warned by the PCS warning indicator and a warning message on the multi-information display in the combination meter assembly.
      Master Warning Indicator Warning Message Detail DTC PCS Warning Indicator
      ON Check PCS System This message is displayed when the driving support ECU assembly detects a system malfunction Flashes
      OFF PCS temporarily not available This message is displayed when the driving support ECU assembly is in fail-safe mode
      Refer to FAIL-SAFE CHART [09/2014 - 11/2017] 
      - Illuminates
    2. Initial check
      1. The initial check occurs when the engine switch is turned off for more than 2 seconds, and then turned on (IG). The initial check consists of a pre-collision system diagnostic check with a duration of approximately 3 seconds.
      2. If a malfunction is detected during the initial check, the multi-information display will display "Check PCS System " or "PCS temporarily not available".
    3. Constant check
      1. The driving support ECU assembly constantly monitors the pre-collision system for malfunctions after the engine switch is turned on (IG) and the initial check (approximately 3 seconds) has completed.
      2. "Check PCS System" or "PCS temporarily not available" is displayed on the multi-information display in the combination meter assembly when the constant check detects malfunctions in the pre-collision system.